> Well, for a bank it can be super duper useful because it's "incorruptible digital ledger of economic transactions" (the very definition of a blockchain). If

> Well, for a bank it can be super duper useful because it's "incorruptible digital ledger of economic transactions" (the very definition of a blockchain). If that’s the definition of a blockchain then it must include proof-of-work. Data doesn’t become incorruptible because you put it inside a block that points to the hash of a previous block.